POLYMER BULLETIN
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2016
·Vol. 74
·期 5
·1831-1847
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IF 1.371
Hou Xiaoman,Yang Wei,Li Aiming,Hou Jiazi,Zhang Chunling
A novel system for enhancing the properties of P( N -isopropylacrylamide- co -poly(ethylene glycol)diacrylate) (P(NIPAM- co -PEGDA)) temperature-sensitive hybrid hydrogels by incorporating acrylolsobutyl polyhedral oligomeric silsesquioxane (MAPOSS) was developed in this study. Inorganic/organic hybrid P(NIPAM- co -PEGDA) hydrogels based on MAPOSS were synthesized via free radical polymerization. Environmental scanning electron microscopy images showed that hydrogels with different feed ratios exhibited significant changes in the porous structure and average pore size. The heterogeneous and irregular network was caused mainly by MAPOSS aggregation. The rigid cage-like nanostructure of MAPOSS had dual opposite effects on polymer thermal properties; this effect was proven through differential scanning calorimetry and thermogravimetric analysis. The mechanical behaviors of the swollen hydrogels investigated through compression test showed that MAPOSS incorporation enhanced the yield strength. Swelling, deswelling and reswelling behaviors of hydrogels with different feed ratios were systematically examined and compared. The increase in MAPOSS provided the hydrogels with improved deswelling rate because of its cage-like nanostructure and hydrophobicity.
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REACTIVE & FUNCTIONAL POLYMERS
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2019
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IF 3.074
Xiaolin Wang,Zhengping Liu,Liyan Huang
A novel pH and thermo dual-responsive graft copolymer , starch- graft -poly( N , N -diethyl aminoethyl methacrylate- co -poly(ethylene gly co l) methyl ether methacrylate) [starch-g-P(DEAEMA-co-PEGMA)], was successfully synthesized through single-electron transfer living radical polymerization (SET-LRP). The structure and molecular weight of the grafted chains were confirmed by 1 H NMR. These graft copolymers can self-assemble into micelles with starch backbone and PDEAEMA as the core and PPEGMA as the corona in water at pH 7.4. The critical micelle concentration (CMC) of the graft copolymers varied between 0.0313 and 0.1364 mg/mL, decreasing with an increase in the molecular weight of the grafted chains and the ratio of PDEAEMA and PPEGMA segments. The pH and thermo dual-responsive behaviors of starch-g-P(DEAEMA-co-PEGMA) micelles were investigated by DLS and TEM . As the pH decreasd from 8.0 to 5.5, the micelle sizes continued to increase due to the protonation of the PDEAEMA segments, and as the pH decreased to below 5.5, the micelles began to disassemble, which was verified by TEM observations. Upon heating, the size of the micelles decreased because of the shrinkage of the PDEAEMA segments. The pH and thermo dual-responsive behaviors of the starch-g-P(DEAEMA-co-PEGMA) micelles are reversible. Doxorubicin (DOX), a hydrophobic drug, was encapsulated in the micelles, and in vitro release from the drug-loaded micelles displayed good pH-responsive behavior.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 21.1
Jie Sun,Nan Zhao,Jianjiao Xin,Miao Yu,Chunmei Lv,Yanqing Jiao,Xiuwen Wang
Rational designing a robust bifunctional electrocatalyst for urea-assisted water splitting (UWS) toward a carbon-neutral economy is imperative factor to address the energy-intensive challenges of sustainable hydrogen production at industrial current densities. In this study, a Mo/P co-doped Ni 3 S 2 one-dimensional nanoarray, decorated with two-dimensional nanosheets (MP-Ni 3 S 2 ), is synthesized using an in-situ growth method. The optimized MP-Ni 3 S 2 exhibits a significant advantage in the urea oxidation reaction (UOR), achieving much lower potentials (1.346 V at 100 mA cm −2 and 1.505 V at 1000 mA cm −2 in 1.0 M + 0.33 M urea) comparable to the oxygen evolution reaction (OER), which requires 302 mV and 445 mV at the same current densities. The MP-Ni 3 S 2 ||MP-Ni 3 S 2 electrolyzer reduces the cell voltage from 2.146 V for overall water splitting (OWS) to 1.856 V for UWS at 500 mA cm −2 , surpassing most reported catalysts. Theocratical calculations demonstrate that Mo and P doping in Ni 3 S 2 , through the hybridization of Mo/Ni 3d and N/O 2p orbitals, effectively accelerates UOR kinetics by lowering the energy barrier in dehydrogenation and N-N coupling processes, while P doping optimizes the Gibbs free energy of hydrogen adsorption (ΔG H* ) to enhance HER activity, thereby synergistically improving overall performance. These findings offer a viable strategy for the development of energy-saving hydrogen production.
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Science China-Chemistry
·
2026
·
IF 9.8
Wang Nan,An Tinghui,Li Jiaqi,Wang Yuhao,Xiang Dong,Cai Kedi
Cu-based electrocatalysts are promising for the electrocatalytic CO 2 reduction reaction (eCO 2 RR) to realize valuable chemicals production. Here, a Mg-doped Cu based electrocatalysts via transient CO 2 pulsed laser (L 4 -Mg/Cu x O) was synthesized for highly selective eCO 2 RR to ethanol (C 2 H 5 OH). The synergistic effect of Mg-doping and transient CO 2 pulsed laser irradiation enables excellent eCO 2 RR performance, realizing Faradaic efficiencies (FE) of 52.2% and 74.1% for C 2 H 5 OH and C 2 products under a high current density of 298.9 mA cm −2 , respectively. Operando Raman spectroscopy and DFT simulations results confirm that Mg-doping strategy suppresses the hydrogen evolution reaction (HER), enhances CO adsorption, elevates local pH and accelerates H 2 O dissociation, which could be beneficial for promoting OC–CO coupling and proton supply in eCO 2 RR. Furthermore, Mg incorporation induces electron delocalization in which electron accumulation on the C atom of *CHCOH intermediate and its enhanced p-d orbital coupling with Cu interface, which stabilizes the C–O bond from breakage and selectively favours the C 2 H 5 OH pathway, thus decoupling the selectivity between C 2 H 5 OH and ethylene. When employed in Li-CO 2 batteries, L 4 -Mg/Cu x O delivers 20480 mAh g −1 discharge capacity and cycling stability over 187 cycles. This work presents a universal strategy for regulating eCO 2 RR selectivity through precise laser energy delivery, demonstrating significant potential for renewable energy conversion and storage.
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ACS Catalysis
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2026
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IF 13.6
Shunwu Wang,Zhenbo Guo,Bing Tang,Jinglin Du,Qianling Zou,Ligang Wang,Xiaohui Li,Xiaodong Zhou,Lang Liu,Yadong Li
Developing chemoselective hydrogenation of alkynes into alkenes is one of the major strategies of the fine chemical industry; however, it presents significant challenges in achieving the semi-hydrogenation of carbon−carbon triple bond (C=C) to carbon−carbon double bond (C=C) without further hydrogenation. Herein, it is proposed that d−p orbital hybridization between the Pd single-atom-cluster sites and the bismuth species can serve as a descriptor for revealing the catalytic activity. Guided by DFT simulation, the well-dispersed Pd clusters and single-atom Pd−O4 sites on Bi-doped hydroxyapatite (PdSA+C/HAP-Bi) are fabricated for semi-hydrogenation of phenylacetylene, realizing the trade-off between activity and selectivity with a robust turnover frequency of 10,140 h−1, surpassing those of the commercial Pd/C catalyst and most of the reported catalysts. It also displays good stability for enduring six cycles with minimal declines in conversion and selectivity. Notably, this catalyst offers a general platform, showcasing broad substrate compatibility across at least 30 types of alkynes. Particularly, the introduction of well-dispersed Bi and PdC can induce prominent electron redistribution at the Pd−O4 sites and adjust the hybridization between the central Pd 3d and Bi 4f orbitals. Simultaneously, the strong electronic coupling in Pd−O−Bi pairs facilitated the d-electron domination near the Fermi level, boosted the activation of H2 and phenylacetylene at PdC sites, and improved the desorption capacity of styrene at Pd−O4 sites. This synergy ultimately lowers the energy barrier for the phenylacetylene semi-hydrogenation.
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COMPOSITES SCIENCE AND TECHNOLOGY
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2026
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IF 9.9
Tiantian Li,Weipeng Huang,Yi Li,Lijuan Zhu,Ce Liang
Homologous interfacial engineering enables atomic anchoring of P-CNPs onto C-Ti 3 C 2 T x via Ti-O-C covalent bonds. • Hierarchical architecture acts as wave confinement walls, inducing Maxwell-Wagner polarization and extended dissipation paths. • EMI SE reaches 75.44 dB at 4 wt% loading with absorption as the dominant shielding mechanism. • Composite achieves 215.4 MPa tensile strength, overcoming conductivity–mechanical integrity trade-off. Achieving a synergistic balance between electromagnetic interference (EMI) shielding and mechanical robustness in carbon fiber-reinforced polymers (CFRPs) remains a fundamental challenge due to the long-standing trade-off between electrical conductivity and mechanical integrity. Here, we report a homologous interfacial reinforcement strategy to engineer a hierarchical architecture via the atomic-scale anchoring of C-Ti 3 C 2 T X and polyimide/polydopamine-derived carbon nanoparticles (P-CNPs). The formation of Ti-O-C covalent bonds yields a continuous hybrid network that effectively suppresses MXene restacking. This hierarchical configuration acts as electromagnetic-wave confinement walls, inducing pronounced Maxwell-Wagner polarization and extending energy-dissipation pathways through multiple internal reflections. The composite achieves a high EMI shielding effectiveness (SE) of 75.44 dB at a low filler loading of 4 wt%, while maintaining an excellent tensile strength of 215.4 MPa. The homologous interfacial engineering strategy presented here offers a transformative route for simultaneously integrating mechanical robustness with absorption-enhanced EMI functionality, providing new design insights for integrated materials in aerospace and microelectronics. Download: Download high-res image (324KB) Download: Download full-size image
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ACS Applied Energy Materials
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2026
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IF 5.5
Yi Cao,Hao Ren,Tianjiao Ling,Junli Zhu,Yuanyuan Zhang,Lan Hong,Minqi Sheng
Precious metal-based catalysts exhibit superior performance over non-precious metal-based counterparts in acidic water splitting due to their relatively high corrosion resistance. However, their catalytic performance, especially in terms of mass activity and durability, is yet to be improved to meet commercial requirements. Herein, ultrathin porous Ir−Co−P alloy nanosheets (∼2.14 nm thick) with abundant grain boundaries, denoted as Ir−Co−P 340, were successfully synthesized via a KOH-assisted calcination and sequent phosphidation. The distinctive two-dimensional morphology exposes more surface atoms, shortens charge diffusion distances, and induces strong physical repulsion to prevent aggregation, while numerous pores facilitate efficient electrolyte penetration. The abundant grain boundaries not only proliferate active sites but also stabilize microstructures through a pinning effect. Dual alloying with Co and P enhances intrinsic catalytic activity and conductivity while reducing the cost of the catalyst. As a bifunctional catalyst in 0.5 M H2SO4 solution, Ir−Co−P 340 exhibited remarkable precious metal mass activities of 11.09 A mgIr−1 (HER, −0.03 Vvs.RHE) and 2.56 A mgIr−1 (OER, 1.26 Vvs.RHE), approximately 2.04 and 8.5 times higher than those of Pt/C and rutile-IrO2, respectively. A symmetric PEM electrolysis cell (Ir−Co−P 340||Ir−Co−P 340) delivered an ultralow cell voltage of 1.49 V at 10 mA cm−2 and outstanding durability over 200 h at a high current density of 50 mA cm−2.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Wantong Jiang,Juntao Hu,Jiachun Wang,Ziyu Kuai,Dongwei Zhu,Yu Qin,Mengmeng Niu,Yibing Huang,Quan Luo
Selective detection of highly toxic p -nitrophenyl organophosphates (pNOPs) is of great importance for food safety and environmental risk assessment. Herein, peptide-coated bifunctional gold clusterzymes (AuCEs) that integrate hydrolase-like and peroxidase-like activities are developed via a surface-engineered catalytic triad strategy to achieve rapid, selective, and dual-mode colorimetric/fluorescent detection of pNOPs. The fluorescence signal is generated by the selective hydrolysis of pNOPs into p -nitrophenol (pNP), which interacts with AuCEs and quenches their fluorescence. For the colorimetric signal, pNOPs inhibit the multi-enzyme cascade system of acetylcholinesterase (AChE) and choline oxidase (ChOx) to reduce H 2 O 2 production and thereby affect the AuCEs-mediated oxidation of 3,3,5,5-tetramethyl-benzidine (TMB) into a blue product. This dual-signal detection method offers a linear fluorescence detection range from 6 to 540 ng/mL with a detection limit of 4 ng/mL (ppb), and a linear colorimetric detection range from 8 to 480 ng/mL with a detection limit of 1.08 ng/mL (ppb). Real food sample testing demonstrates that this dual-signal detection not only exhibits excellent selectivity for the p -nitrophenyl group, but also integrates self-calibration to enhance the accuracy of pNOPs detection.
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Journal of CO2 Utilization
·
2017
·
IF 4.292
Lijun Zhao,Haiyang Cheng,Tong Liu,Yan Li,Zhong Ying,Wenjing Yang,Weiwei Lin,Xiangchun Meng,Chengxue Wang,Fengyu Zhao
An efficient green process was developed for production of p -aminophenol (PAP) from hydrogenation of nitrobenzene (NB) over a traditional Pt/Al 2 O 3 catalyst in a reaction medium of supercritical CO 2 (scCO 2 ) and H 2 O without any additional acid catalyst involved. The combination of scCO 2 and H 2 O was confirmed to be effective for the production of PAP. The acidity, aroused by the in situ formed carbonic acid, increased with CO 2 pressure, which acted as acid catalysis during the reaction, and it can easily self-neutralize by depressurization of CO 2 , resulting in a green and a intensive process for it removed the final neutralization and salts disposal of the traditional liquid acids. Under the optimal reaction conditions, a high yield to PAP (68.9%) was achieved at the high conversion of NB (98.5%). Moreover, the results of in situ diffuse reflectance FTIR spectra revealed that CO was generated by the reverse water-gas shift reaction (CO 2 + H 2 → CO + H 2 O), it can adsorbed on the surface of Pt/Al 2 O 3 to suppress the undesired deep hydrogenation of N -phenylhydroxylamine (PHA) to aniline (AN), which also contributed to the obtained high selectivity of PAP. Therefore, the present green and efficient catalysis process will arouse the interest of researchers in the fields of the green and sustainable organic synthesis.
研究领域:
绿色化学
·
有机合成
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催化化学
·
环境友好工艺
·
工业化学
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Xuxu Wang,Wenhui Qu,Ruxiu He,Junling Meng,Fen Yao,Ping Nie,Hairui Wang,Limin Chang,Limin Wang
Cobalt phosphide is a promising anode material for lithium-ion batteries (LIBs) due to a high theoretical capacity at low potentials when reaction with lithium. While, capacity-decay upon cycling and unsatisfied rate performance limited the practical application in LIBs. Herein, we report the design and synthesis of free-standing electrode composed of CoP/P-C nanofilm and lightweight carbon cloth (denoted as PCC@CoP/P-C) as an anode material for LIBs. The facile and in situ strategy for the synthesis of PCC@CoP/P-C involves phytic acid (PA) complexed with Co 2+ and subsequent annealing treatments. Owing to the unique structural merits of CoP/P-C nanofilm and the lightweight PCC , the PCC@CoP/P-C free-standing electrode exhibits an ultrahigh specific stability capacity and nice cycle stability when direct used as anode for LIBs. This work offers an easy and environment friendly method to boost lithium performance for transition metal phosphides anode materials.
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Applied Materials Today
·
2023
·
IF 8.3
Guiyang Yu,Ke Gong,Lan Hu,Chuanwang Xing,Yujia Hu,Debao Wang,Xiyou Li
The development of mild and environmental method for direct transformation of aromatic alcohol into hydrobenzoin via controlled C‒C coupling is a highly attractive but challenging goal. In this paper, a P-doped g-C 3 N 4 photocatalyst with NiS nanoparticles modification is first reported to apply the visible-light-driven C‒C coupling of aromatic alcohol into hydrobenzoin, as well as integrating with the production of clean H 2 fuel. The synergistic effect of doped P atoms and formed type-II heterojunction between PCN and NiS improves the light absorption ability of g-C 3 N 4 and greatly suppresses the charge recombination. Optimized 2.0% NiS/PCN composite achieves the complete conversion of aromatic alcohol within 6 h reaction time, as far as we known, which is the highest efficiency so far for aromatic alcohol conversion via photocatalytic strategy. Hydrobenzoin is controllably formed with 68% selectivity, together with a highly-efficient H 2 production rate of 994.8 μmol·g −1 ·h −1 . In-situ EPR studies reveal a preferential activation of C‒H bond than O‒H bond in aromatic alcohol by photoexcited holes, forming C 6 H 5 ĊH 2 OH radicals for subsequent coupling. The residual protons interact with photoexcited electrons to generate H 2 . Our study not only offers an efficient g-C 3 N 4 -based photocatalyst for the synthesis of hydrobenzoin under mild conditions, but also opens up a new avenue for manipulating the activation of C‒H or O‒H bonds for high selectivity of hydrobenzoin product.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jie Tao,Feihao Yang,Tao Wu,Junjiao Shi,Hai-Bo Zhao,Wenhui Rao
The frequent occurrence of fires caused by rigid polyurethane foam highlights the importance of its fire safety, however, the existing flame-retardant methods often seriously deteriorate the mechanical properties and thermal insulation of the foam. Here, we demonstrate a new idea for thermal insulation, flame retardancy, smoke suppression, and reinforcement of polyurethane foams only by incorporating a P/Cu-hybrid silica aerogel. This unique aerogel combines with the carbon-promoting action of P, catalytic attenuation of Cu, and the barrier effect of aerogels, thus leading to high smoke-suppressing and flame-retardant efficiency for polyurethane foam. At a low addition amount of 5 wt% aerogel, the total heat release, peak heat release rate, total smoke release, and toxic CO production of the composite foam are all significantly reduced. Interestingly, the aerogel-containing composite foam exhibits a special hierarchical porous structure, which enables lower thermal conductivity and higher thermal insulation than pure RPUF. Benefitting from the good compatibility and nano-enhancing effect of the aerogel, the compressive strength of the composite foam remarkable increase of 52.2%. This research offers an effective method for designing high-performance foam materials with high fire safety and low thermal conductivity, which has broad application prospects in the field of thermal insulation.
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危险品化学品经营许可证（带存储）